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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <windows.h>
#include <process.h>
#include "base/thread_local_storage.h"
#include "testing/gtest/include/gtest/gtest.h"
// ignore warnings about ptr->int conversions that we use when
// storing ints into ThreadLocalStorage.
#pragma warning(disable : 4311 4312)
namespace {
class ThreadLocalStorageTest : public testing::Test {
};
}
TEST(ThreadLocalStorageTest, Basics) {
ThreadLocalStorage::Slot slot;
slot.Set(reinterpret_cast<void*>(123));
int value = reinterpret_cast<int>(slot.Get());
EXPECT_EQ(value, 123);
}
const int kInitialTlsValue = 0x5555;
static ThreadLocalStorage::Slot tls_slot(base::LINKER_INITIALIZED);
unsigned __stdcall TLSTestThreadMain(void* param) {
// param contains the thread local storage index.
int *index = reinterpret_cast<int*>(param);
*index = kInitialTlsValue;
tls_slot.Set(index);
int *ptr = static_cast<int*>(tls_slot.Get());
EXPECT_EQ(ptr, index);
EXPECT_EQ(*ptr, kInitialTlsValue);
*index = 0;
ptr = static_cast<int*>(tls_slot.Get());
EXPECT_EQ(ptr, index);
EXPECT_EQ(*ptr, 0);
return 0;
}
void ThreadLocalStorageCleanup(void *value) {
int *ptr = reinterpret_cast<int*>(value);
if (ptr)
*ptr = kInitialTlsValue;
}
TEST(ThreadLocalStorageTest, TLSDestructors) {
// Create a TLS index with a destructor. Create a set of
// threads that set the TLS, while the destructor cleans it up.
// After the threads finish, verify that the value is cleaned up.
const int kNumThreads = 5;
HANDLE threads[kNumThreads];
int values[kNumThreads];
tls_slot.Initialize(ThreadLocalStorageCleanup);
// Spawn the threads.
for (int16 index = 0; index < kNumThreads; index++) {
values[index] = kInitialTlsValue;
void *argument = static_cast<void*>(&(values[index]));
unsigned thread_id;
threads[index] = reinterpret_cast<HANDLE>(
_beginthreadex(NULL, 0, TLSTestThreadMain, argument, 0, &thread_id));
EXPECT_NE(threads[index], (HANDLE)NULL);
}
// Wait for the threads to finish.
for (int index = 0; index < kNumThreads; index++) {
DWORD rv = WaitForSingleObject(threads[index], 60*1000);
EXPECT_EQ(rv, WAIT_OBJECT_0); // verify all threads finished
// verify that the destructor was called and that we reset.
EXPECT_EQ(values[index], kInitialTlsValue);
}
}
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